src/smpi/smpi_base.c

   1 #include "private.h"
   2 #include "xbt/time.h"
   3
   4 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_base, smpi,
   5                                 "Logging specific to SMPI (base)");
   6 XBT_LOG_EXTERNAL_CATEGORY(smpi_base);
   7 XBT_LOG_EXTERNAL_CATEGORY(smpi_bench);
   8 XBT_LOG_EXTERNAL_CATEGORY(smpi_kernel);
   9 XBT_LOG_EXTERNAL_CATEGORY(smpi_mpi);
  10 XBT_LOG_EXTERNAL_CATEGORY(smpi_receiver);
  11 XBT_LOG_EXTERNAL_CATEGORY(smpi_sender);
  12 XBT_LOG_EXTERNAL_CATEGORY(smpi_util);
  13
  14 smpi_mpi_global_t smpi_mpi_global = NULL;
  15
  16 void smpi_mpi_land_func(void *a, void *b, int *length,
  17                         MPI_Datatype * datatype);
  18
  19 void smpi_mpi_land_func(void *a, void *b, int *length,
  20                         MPI_Datatype * datatype)
  21 {
  22   int i;
  23   if (*datatype == smpi_mpi_global->mpi_int) {
  24     int *x = a, *y = b;
  25     for (i = 0; i < *length; i++) {
  26       y[i] = x[i] && y[i];
  27     }
  28   }
  29 }
  30
  31 void smpi_mpi_sum_func(void *a, void *b, int *length,
  32                        MPI_Datatype * datatype);
  33
  34 void smpi_mpi_sum_func(void *a, void *b, int *length, MPI_Datatype * datatype)
  35 {
  36   int i;
  37   if (*datatype == smpi_mpi_global->mpi_int) {
  38     int *x = a, *y = b;
  39     for (i = 0; i < *length; i++) {
  40       y[i] = x[i] + y[i];
  41     }
  42   }
  43 }
  44
  45 int smpi_mpi_comm_rank(smpi_mpi_communicator_t comm)
  46 {
  47   return comm->index_to_rank_map[smpi_host_index()];
  48 }
  49
  50 void smpi_process_init()
  51 {
  52   smx_host_t host;
  53   int i;
  54   smpi_host_data_t hdata;
  55
  56   smpi_global->running_hosts_count++;
  57
  58   // initialize some local variables
  59   host = SIMIX_host_self();
  60
  61   hdata = xbt_new(s_smpi_host_data_t, 1);
  62   SIMIX_host_set_data(host, hdata);
  63   SIMIX_process_set_data(SIMIX_process_self(),hdata);
  64
  65   for (i = 0; i < smpi_global->host_count && host != smpi_global->hosts[i]; i++);
  66
  67   hdata->index = i;
  68   hdata->mutex = SIMIX_mutex_init();
  69   hdata->cond = SIMIX_cond_init();
  70
  71   hdata->pending_recv_request_queue = xbt_fifo_new();
  72
  73   hdata->main = SIMIX_process_self();
  74   hdata->sender = SIMIX_process_create("smpi_sender",
  75           smpi_sender, hdata,
  76           SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
  77           /*props */ NULL);
  78   hdata->receiver = SIMIX_process_create("smpi_receiver",
  79           smpi_receiver, hdata,
  80           SIMIX_host_get_name(SIMIX_host_self()), 0, NULL,
  81           /*props */ NULL);
  82
  83   smpi_global->main_processes[hdata->index] = SIMIX_process_self();
  84   return;
  85 }
  86
  87 void smpi_process_finalize()
  88 {
  89   int i;
  90   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
  91
  92   i = --smpi_global->running_hosts_count;
  93
  94   SIMIX_mutex_destroy(smpi_host_mutex());
  95   SIMIX_cond_destroy(smpi_host_cond());
  96   xbt_fifo_free(hdata->pending_recv_request_queue);
  97
  98   if (0 >= i) {
  99
 100     // wake up senders/receivers
 101           /* MQ: (FIXME) Don't do so: it breaks since some hosts are already gone
 102     for (i = 0; i < smpi_global->host_count; i++) {
 103       smpi_host_data_t remote_hdata =  SIMIX_process_get_data(smpi_global->main_processes[i]);
 104
 105       if (SIMIX_process_is_suspended(remote_hdata->sender))
 106         SIMIX_process_resume(remote_hdata->sender);
 107
 108       if (SIMIX_process_is_suspended(remote_hdata->receiver))
 109         SIMIX_process_resume(remote_hdata->receiver);
 110     }*/
 111
 112     SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex);
 113     SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond);
 114     xbt_free(smpi_mpi_global->mpi_comm_world);
 115
 116     xbt_free(smpi_mpi_global->mpi_byte);
 117     xbt_free(smpi_mpi_global->mpi_int);
 118     xbt_free(smpi_mpi_global->mpi_double);
 119
 120     xbt_free(smpi_mpi_global->mpi_land);
 121     xbt_free(smpi_mpi_global->mpi_sum);
 122
 123     xbt_free(smpi_mpi_global);
 124   }
 125 }
 126
 127 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
 128 {
 129
 130   SIMIX_mutex_lock(comm->barrier_mutex);
 131   ++comm->barrier_count;
 132   if (comm->barrier_count > comm->size) {       // only happens on second barrier...
 133     comm->barrier_count = 0;
 134   } else if (comm->barrier_count == comm->size) {
 135     SIMIX_cond_broadcast(comm->barrier_cond);
 136   }
 137   while (comm->barrier_count < comm->size) {
 138     SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 139   }
 140   SIMIX_mutex_unlock(comm->barrier_mutex);
 141
 142   return MPI_SUCCESS;
 143 }
 144
 145 int smpi_mpi_isend(smpi_mpi_request_t request)
 146 {
 147         smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
 148   int retval = MPI_SUCCESS;
 149
 150   if (NULL == request) {
 151     retval = MPI_ERR_INTERN;
 152   } else {
 153     xbt_fifo_push(smpi_global->pending_send_request_queues[hdata->index], request);
 154
 155     if (SIMIX_process_is_suspended(hdata->sender)) {
 156       SIMIX_process_resume(hdata->sender);
 157     }
 158   }
 159
 160   return retval;
 161 }
 162
 163 int smpi_mpi_irecv(smpi_mpi_request_t request)
 164 {
 165   int retval = MPI_SUCCESS;
 166   smpi_host_data_t hdata =  SIMIX_host_get_data(SIMIX_host_self());
 167
 168   if (NULL == request) {
 169     retval = MPI_ERR_INTERN;
 170   } else {
 171     xbt_fifo_push(hdata->pending_recv_request_queue, request);
 172
 173     if (SIMIX_process_is_suspended(hdata->receiver)) {
 174       SIMIX_process_resume(hdata->receiver);
 175     }
 176   }
 177
 178   return retval;
 179 }
 180
 181 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t * status)
 182 {
 183   int retval = MPI_SUCCESS;
 184
 185   if (NULL == request) {
 186     retval = MPI_ERR_INTERN;
 187   } else {
 188     SIMIX_mutex_lock(request->mutex);
 189     while (!request->completed) {
 190       SIMIX_cond_wait(request->cond, request->mutex);
 191     }
 192     if (NULL != status) {
 193       status->MPI_SOURCE = request->src;
 194       status->MPI_TAG = request->tag;
 195       status->MPI_ERROR = MPI_SUCCESS;
 196     }
 197     SIMIX_mutex_unlock(request->mutex);
 198   }
 199
 200   return retval;
 201 }